diff options
| author | Philipp Reisner <philipp.reisner@linbit.com> | 2010-11-16 10:07:53 +0100 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2011-03-10 11:34:59 +0100 |
| commit | 127b317844e7cc0458743b604998bece95eab030 (patch) | |
| tree | 305a594fc498e9a2702fcf2a8a660b44ab241ab2 | |
| parent | aeda1cd6a58009ef21b6d9c09b1a3ded726c2d10 (diff) | |
drbd: use test_and_set_bit() to decide if bm_io_work should be queued
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index f49505cf8d0..843b9096692 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -3772,6 +3772,7 @@ static int w_bitmap_io(struct drbd_conf *mdev, struct drbd_work *w, int unused) drbd_bm_unlock(mdev); clear_bit(BITMAP_IO, &mdev->flags); + smp_mb__after_clear_bit(); wake_up(&mdev->misc_wait); if (work->done) @@ -3850,11 +3851,8 @@ void drbd_queue_bitmap_io(struct drbd_conf *mdev, set_bit(BITMAP_IO, &mdev->flags); if (atomic_read(&mdev->ap_bio_cnt) == 0) { - if (list_empty(&mdev->bm_io_work.w.list)) { - set_bit(BITMAP_IO_QUEUED, &mdev->flags); + if (!test_and_set_bit(BITMAP_IO_QUEUED, &mdev->flags)) drbd_queue_work(&mdev->data.work, &mdev->bm_io_work.w); - } else - dev_err(DEV, "FIXME avoided double queuing bm_io_work\n"); } } |